A cylinder has $V=110$ cm³ and $r=$ ? when $h=10$ cm (use $\pi=22/7$)

A cylinder has $V=110$ cm³ and $r=$ ? when $h=10$ cm (use $\pi=22/7$)
  1. approx $1.87$ cm
  2. $3.5$ cm
  3. $7$ cm
  4. $5$ cm

Solution

$r^2=110\cdot7/(22\cdot10)=3.5 \Rightarrow r\approx 1.87$.

Asked in: MH-SSC-9

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